"We don't have records of all the finest treasures of the central region?" Lin Feng asked. Although their sect was formed after the destruction of the central region, surely there must be other old sects in the northern region which existed before it. And since they all are under Frozen Heart Sect, they must have access to it.
Treasures which can give a weaker sect confidence should be quite well-known in their time, unless of course it was hidden by the owners of those treasures.
But it seems like Yin Yang Harmony Sect went there with a clear target in their mind, so they definitely have a clue, or maybe they really got fortunate.
Hua Ying nodded, "We have gone through it already, but we doubt it was any of those treasures as they existed in the core area, in the hands of the top two sects at that time. No matter what, we don't believe that Yin Yang Harmony Sect is able to retrieve them, it's impossible."